.markItUp .markItUpButton1 a {
  background-image:url(images/bold.png); 
}
.markItUp .markItUpButton2 a {
  background-image:url(images/italic.png); 
}
.markItUp .markItUpButton3 a {
  background-image:url(images/list-bullet.png);
}
.markItUp .markItUpButton4 a {
  background-image:url(images/list-numeric.png);
}
.markItUp .markItUpButton5 a {
  background-image:url(images/picture.png); 
}
.markItUp .markItUpButton6 a {
  background-image:url(images/link.png);
}
.markItUp .markItUpButton7 a {
  background-image:url(images/quotes.png);
}
.markItUp .markItUpButton8 a {
  background-image:url(images/code.png);
}